Eaton E-Locker and 7/16" ring gear bolts; what is the correct setup?

[Hackyman]

Posting this to resolve a question in my build thread.

I have an eaton 19977 e locker, and revolution gears.

The locker has 3/8" holes and 1/2" holes

The ring gear has 3/8" holes and 7/16" holes.

The kit I received from revolution has 7/16" ring gear bolts.

What is the correct way to mate the two together? Right now I have the 7/16" bolts in the 1/2" hole on the carrier, but am now concerned about the carrier hole size being larger than the bolt.

Eaton instructions say:

Ring gears exist with 3/8”, 7/16”, and 1/2” fasteners. Eaton performance
differentials for this application are typically machined with both 7/16” and 1/2” clearance holes. This allows the fitment of the two smaller bolt sizes into the small pattern, and the larger fasteners into the larger hole pattern, thus ensuring sufficient material under the bolt heads
to allow proper tensioning of the fastener. A close fit between the bolt and the differential is not required if correct ring gear bolts are used"

I have heard of people using bolt sleeves, or fancy shouldered bolts. What is correct way to put this together, and is my current set up wrong?

Id really rather not drill out the carrier.

 

[Woodrow]

Posting this to resolve a question in my build thread.

I have an eaton 19977 e locker, and revolution gears.

The locker has 3/8" holes and 1/2" holes

The ring gear has 3/8" holes and 7/16" holes.

The kit I received from revolution has 7/16" ring gear bolts.

What is the correct way to mate the two together? Right now I have the 7/16" bolts in the 1/2" hole on the carrier, but am now concerned about the carrier hole size being larger than the bolt.

Eaton instructions say:

Ring gears exist with 3/8”, 7/16”, and 1/2” fasteners. Eaton performance
differentials for this application are typically machined with both 7/16” and 1/2” clearance holes. This allows the fitment of the two smaller bolt sizes into the small pattern, and the larger fasteners into the larger hole pattern, thus ensuring sufficient material under the bolt heads
to allow proper tensioning of the fastener. A close fit between the bolt and the differential is not required if correct ring gear bolts are used"

I have heard of people using bolt sleeves, or fancy shouldered bolts. What is correct way to put this together, and is my current set up wrong?

Id really rather not drill out the carrier.

I saw this the other day and I'm surprised no one responded. The ring gear holes should match the bolts you use in the carrier as far as I know. If this isn't possible, I would call the either Eaton or RGA for a solution. Hopefully you got both from same place and they can help you sort this out.

 

[freedom_in_4low]

I saw this the other day and I'm surprised no one responded. The ring gear holes should match the bolts you use in the carrier as far as I know. If this isn't possible, I would call the either Eaton or RGA for a solution. Hopefully you got both from same place and they can help you sort this out.

The ring gear holes are the ones that are threaded.

If Eaton says you can put 7/16" holes through the 1/2" holes in their carrier, that's good enough for me. If the carrier was sliding around enough for the slack to matter, you have bigger problems (bolts put the carrier flange under compression such that the friction in the interface between ring gear and carrier is what keeps things from spinning. Not the shear strength of the bolts).

 

[Woodrow]

The ring gear holes are the ones that are threaded.

Yep, I was forgetting that.

If Eaton says you can put 7/16" holes through the 1/2" holes in their carrier, that's good enough for me. If the carrier was sliding around enough for the slack to matter, you have bigger problems (bolts put the carrier flange under compression such that the friction in the interface between ring gear and carrier is what keeps things from spinning. Not the shear strength of the bolts).

What you say makes sense, especially after I re-read what OP posted from eaton's instructions. Still makes me nervous though. I haven't had that come up when I've done new ring gears/carriers.

 

[Hackyman]

Yep going to run it as it is. Thanks everyone.